From 1D Polymeric Chain to Two-fold Parallel Interpenetration of (4,4) Net: Synthesis and Characterization of Two New Copper(Ⅱ) Complexes Derived from Highly Polydentate Aminopolycarboxylate Ligand

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2008,（7）
• 页码范围: 1233-1238
• 页数: 6页
• 语种: 英文

摘要

Two new copper(Ⅱ) polymers, {[Cu2(egta)(bpe)(H2O)2]·H2O}n(1) and {[Cu2(egta)(bipy)(H2O)2]·5H2O}n (2),[H4egta=3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazatetradecanedioic acid, bpe=1,2-bis(4-pyridyl)ethane,bipy=4,4'-bipyridyl] have been synthesized and structurally characterized by single-crystal X-ray diffraction, ele-mental analysis, IR spectra and TG analysis. The structure determination reveals that both 1 and 2 crystallize in a monoclinic system, space group P21/c. Complex 1 exhibits a two-fold parallel interpenetration of (4,4) net frame-work consisting of 1D zigzag chains interlocked together through hydrogen bonding interaction. However, themeso-helix chains of 2 are packed to form 2D supramolecular structures. Interestingly, in 2, the host frameworksencapsulate a unique pentamer water cluster and are further connected into 1D tapes by water-water hydrogenbonding interaction. Magnetic measurements reveal that there is a weak ferromagnetic interaction between the ad-jacent Cu(Ⅱ) ions in 1.